Resumo

PEREZ BARRAZA, María Hilda et al. Prohexadione calcium reduces vegetative growth and increases sprouting floral mango ‘Ataulfo’. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.2, pp.263-276. ISSN 2007-0934.

The irregular in mango production is attributed to variation in bloom. Prohexadione calcium (P-Ca) reduces vegetative growth and promotes flowering in temperate and subtropical fruits such as apple and avocado. In mango 'Ataulfo', no information about. The objective was to determine dosage, time and application number P-Ca in mango 'Ataulfo' in order to ensure flowering and find a replacement for paclobutrazol (PBZ). The study was conducted in 2012-2014 in Tepic and San Blas Nayarit, in both years, the trees were pruned after harvest. Experiment 1 and 2: P-Ca (150, 250 and 500 mg L-1) 0 + 10 + 20 + 30 days after pruning (ddp) and 30 + 45 + 60 ddp, respectively. Experiment 3: P-Ca (500 mg L-1) one, two or three applications to 0, 0 and 0 + 10 + 10 + 20 ddp and Experiment 4: P-Ca (150 and 500 mg L-1) 30 + 45 + 60 ddp and 1500 mg L-1 in one application (1 x) 30 ddp. In all experiments a standard treatment of PBZ (2500 mg L-1) 30 ddp and control (water plus surfactant) was included. The design was completely randomized, 6 replicates a tree as experimental unit. In Experiment 2, it was reduced by 35% vegetative growth with P-Ca 500 mg L-1 (3 x) 30-60 ddp. This same dose of P-Ca (500 mg L-1) (3 x) at 30, 45 and 60 ddp, or one application (1 500 mg L-1) 30 ddp achieved as the effect of PBZ in advance (20 -35 days) and percentage of flowering. In both cycles, both products improved mooring and fruit production. Based on the results obtained it is considered that P-Ca could be a substitute for PBZ in mango 'Ataulfo' to ensure flowering and regular productions each year.

Palavras-chave : Mangifera indica L.; bioregulators of growth; irregular flowering; inhibitors gibberellins; flowering season.

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